112 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXIL 



Odontotermes Assmuthi^ n. sp. 

 Imago. — Not known. 



Soldier. — Belongs to the ceylonicus-ollongatus group but is 

 smaller than either of these two species. 



Head yellow. Mandibles of a dark colour, with the exception of 

 the light basal portion. Antennae yellowish. Abdomen white 

 to whitish jrellow. 



Head with short scattered setse. Abdominal tergites with rather 

 setaceous hair. 



Head quadrate with posterior rounded angles ; the part in 

 front of antennae somewhat narrowed, considerably longer than 

 broad, slightly arched. Fontanelle fairly distinct, but without 

 fontanelle-giand. Basal portion of clypeus rather short. Labrum 

 tongue-shaped, somewhat triangular, pointed. Mandibles rather 

 short and strong. Tooth of left mandible placed at anterior limit 

 of second third of mandible, heel-shaped ( " absatzfoermig"). 

 Tooth of right mandible rudimentary, a trifle in front of the middle 

 of mandible. Antennas of 16 (?) joints, 2nd as long as 3rd and 

 4th together, 4th much shorter than 3rd and a little shorter 

 than 5th. 



Pronotum saddle-shaped, narrower than head, distinctly in- 

 dented in front. 



Length of body 5*5 mm. 



Head with mandibles. 2*47 ,, 

 ,, without ,, ... 1*6 ,, 



Width of head 1-18 „ 



,, pronotum ... '86 ,, 



Large Worker. — Head yellow (somewhat rusty). Antennee 

 growing gradually darker towards the tip, brown. 



Head slightly hairy. Hair of abdominal tergites rather dense. 

 Head quadrate, with strongly rounded posterior angles, a little 

 longer than broad. Fontanelle small, placed in the middle of 

 the head. Basal portion of clypeus shorter than half its own 

 width, lentiform, rather convex. Antennee of 17 joints; 2nd 

 joint nearly as long as 3rd and 4th together, 3rd shorter than 

 4th. 



Pronotum somewhat excised in front. 



Length of body... ... 3-5 — 3*7 mm. 



Width of head 1-29 „ 



,, of pronotum ... -65 ,, 



Small Worker. — Colour and hair as above. 



Head oval. Base of clypeus relatively longer than in large 

 worker. Antennae of 16 joints; 2nd joint nearly as long as 3rd 

 and 4th together, 4th shorter than 3rd. 



